Lawn-mower attachment.



BEST AVPJLABLE COP No. 795,191. PATENTED JULY 18,1905.

J. BONSALL.

LAWN MOWER ATTACHMENT.

APPLIOATION FILED AUG.11, 1904.

INVENTOR (fame; WBonsa 22 ATTORNEYS UNITED STATES.

ees'r AVA Patented July 18', 1905.

PATENT OFFICE.

LAWN-MOWER ATTACHMENT.

SPECIFICATION forming part of Letters Patent No. 795,191, dated July 18,1905.

Application filed August 11,1904:- Serial No. 220,350.

T all whom, it may concern/.-

Be it known that I, JAMES WRIGHT BONSALL, a citizen of the UnitedStates, residing at Glenville, in the county of Cuyahoga and State ofOhio, have invented a new and useful Improvement in Lawn-MowerAttachments, of which the following is a specification.

My invention relates to an improvement in lawn-mowers, its object beingto reduce the number of parts and to prevent any grass being carriedaround by the rotating knives and to insure the cutting of all grasswithin the path of the mower.

With these objects in view my invention consists in certain novelfeatures of construc- .ion, arrangement and combination of parts,as willbe hereinafter fully describeohand pointed out in the claims.

Figure 1 is a rear elevation,partly in section, of a lawn-mowerembodying my improvement. Fig. 2 is a vertical section. Fig. 3 is aperspective view of the rotary knife-cylinder. Fig. l is a detailsectional plan view of one side of the mower.

In carrying out my invention,'which is to be applied to lawn-mowers ofthe rotating-cylinder type having the knives spirally secured to a frameorv cylinder, which is secured to the axle of the mower, said knives Awill be secured at their endsto the knife-guides A A by welding or othersuitable means. Said guides or end pieces are to be flat rings of thesame width as that of the blades and of about the same thickness. To therear of rotating knives and below the plan: of the axle is securedpivotally to the frame of the mower the castings B,having the pivots band the rearwardly-projecting ears L. To tiiefront ends of said castingsis riveted or bolted a flat blade U, having its frontedge a beveled andsh pened. Said blade or knife is secured t the under side of the castingB in a cut-out sea 2 A spring D rests or bears against the uppe rear endof each of the castings B, the uppel edge of the blades coinciding andbeing flush end ofsaid spring bearing against the frame of the mower.The oflice of this spring is to always keep the front edge of the knifeG, which is substantially stationary as distin guished from the rotatingblades, against the circumference of the guides A A and just touchingthe revolving knives. The bevel of the front edge of the knife C willsubstantially coincide with the circumference of the guides A A, so thatthe revolving blades will just touch the stationary knife, whereby inusing the lawn-mower no grass can go through beblade, thus insuring aperfect cutting of the grass of the lawn. The spring D will always holdthe stationary knife up to the guides A A, and as the circumference ofthe guides is just even or flush with the cutting-surface no revolvingblades without being first cut.

It will be observed that my improvement is extremely simple and cheap,can be easily applied anddetached, and will add greatly to theefficiency of the mower. The adjustingscrews commonly used on mowers ofthis type are done away with, and should any of the parts, such as theblades or the spring, break they can be readily replaced. The guides A Amay also be removed and replaced when necessary or desired.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a lawn-mower the combination with a rotary cutter consisting ofend guide-rings and integral spiral blades connecting the same, thecircumference of said guide-rings coinciding and being flush with theouter edges of said spiral blades, of an oscillatory knife cillatoryknife having its front edge beveled and coinciding with thecircumference of the end guide-rings, said end guide-rings forming stopsfor the beveled edge of the oscillatory knife.

2. In a lawn-mower the combination with the revolving cutter consistingof end guide-rings and integral spiral blades connecting the same, thecircumference of said rings and the outer knife secured at its ends tosaid oscillatory bars, and having its front edge beveled, said bevelededge coinciding with the circumfertween the revolving blades and thestationary mounted in the frame of the mower, said os' grass, as saidbefore, can be carried up by the ence of the end guide-rings,rearWarclly-exknife, said end guide-rings forming stops for tending earsor lugs at each end of the oscilthe oscillatory knife-bars.

latory knife-bar, lugs projecting inwardly w r t from the frame of themower above the rear- JAMES VVRHIHl BONbALL' 5 wardly-extencling ears orlugs at the ends of Witnesses:

the oscillatory knife-bar, and springs between JOSEPH DERRICO,

the frame-lugs and the cars of the oscillatory W'. ITL'PARKER.

BEST AVAlLABLE COP

